I’m not understanding what you mean by trying to create a Twitter app? A Twitter app is a script/bot which accesses Twitter data. It is just an additional Twitter account, which gives you an id you use when your script/bot talks to Twitter. So Twitter can keep track of who is using it’s API. To do that they require you have a phone number with your profile. So yes, it would be the same as setting up 2FA. Do you have an existing Google Voice number? Or, are you attempting to establish a n…

and has been been moved to its own thread so the discussion on validating RW numbers with different services can remain focused.